Lock slider for slide fasteners



y E. M. WHITNEY 1,858,351

LOCK SLIDER FOR SLIDE FASTENERS Filed May 14, 1930 wings.

Patented May 17, 1932 UNITED STATES PATENT orFlca EBNESTM. WHITNEY, OF PROVIDENCE, RHODE ISLAND, SASSIGNOR '10 HOOKLESS I FASTENER vCOMPANY, A CORPORATION OF PENNSYLVANIA I Loox smnna non SLIDE FASTENERS Application filed May 14, 1930. Serial no; 452,351.

, This invention relates to slide fastenersof the same general construction as shown in the patent to Sundback No. 1,219,881, March 20,

1917,-and particularly to improved meansfor preventing unintended opening ofnthe fastener.

SQ-called lock sliders of various types have been heretofore devised and used in commercial quantities in conjunction with slide fasteners on-v'arious articles. The purpose of the locking feature of these lock sliders is to prevent slipping of the slider back along the fastener after it has been moved to the desired position. A slider without some such locking device may be moved along the fastener elements when lateral strain is placed on the fastener stringers in the locality of the slider, and thus permit the fastener to open up in service.

The presentinvention has for one of its objects the provision of an improved lock slider of simplified construction and one which is particularly adapted to rivetless sliders, that is, sliders whose wings are not held together by a rivet passing through the The present invention is, however,

not necessarily limited to rivetless sliders.

Another object is to provide an improved construction of a slider which hasa rigid neck, in which there is incorporated a looking device operated by a cam member 011 the pull similar to the device shown in my former atent No. 1 598,183,'August 31, 1926.

In the preferred mode of carrying out my invention, a slider with a rigid portion or lug extending adjacent the top wing has at least a portion of the wing movable relative to the lug. An operating member which can be attached to the lug has a cam device for.

engaging and forcing the movable portion toward the lower wing of the slide-r,..thus

clamping the slider against relative move-. mentby frictional engagement with "the fas-v tener elements.

'Other objects and advantages of my invent-ion will more fully, appear during the course of the following specification, and the novel features of'construc'tion will be particularly pointed out in the appended claims.

In the accompanying, drawings, I have shown for purposes of illustration, one embodiment which my invention may assume in practice. In these drawings:

Fig. 1 is a plan view of a slidefastener hav in my invention incorporated therewith.

ig. 2 is a perspective view of the slider of my invention with the pull member removed. I Fig. 3 is a central longitudinal sectional view through the slider. V

Fig. 4 is a longitudinal sectional view through the fastener showing the slider in locked position.

Fig, 5 is a perspective view of the pul member. y i

Fi 6 is a sectional view similar to Fig. 4 showlng the pull: member raised and the slider unlocked.

Fig. 7 is a cross-sectional view through the slider and pull attaching lug.

The slide fastener with'which'my 'inven tion is used may be of any of the known ty es, the one illustrated having a pair of faiiric stringers 8 and 9 with interlocking fastener elements 10 and 11 secured to the adjacent longitudinal edges of the fabric stringers.

These fastener elements are brought together and progressively interlocked or disengaged by movement of a slider generally desig; nated 12, in-a manner which is well understood in the art, and described in detail in the above mentioned patent to Sundback No."

prises overlying spaced upper and lower- I wings 13 and 14 respectively, having iriturned edges providing flanges 15 which engagethe, ends of the fastener elements and define a substantially Y-shaped channel through which the stringers pass during interlocking. The

wings 13 and 14 are joined together at the rear end of the slider by a rigid neck 16 which in the present instance, is formed of'deforme ess although the same may be deformed by and depressed against the fastener.

in enting the sheet metal of the slider. Such a slidercan be formed from a blank which has an integral thickened portion coined up from the metal of the slider blank, .such portion being bent between the wings so that the metal on the inner side of the bend is mate-.

rially compactedand strengthened, thus providing a very compact and rigid neck connection for the wings. The metal of this thickened portion preferably extends longitudinally part way of the wings to form the integral reinforces 17 and 18 on the upper and lowerwings respectively. The rigid portion or lug 19 extends adjacent the wing and is preferably joined to the wing connecting portion or neck 16. It can also be formed integrally withthe wing material by a coining or similar operation. In the present instance, the lug extends over the greater part of the length of the slider and serves as an attaching lug for the pull member 20. This pull member is a generally fiat metal plate having inwardly extending pivotal bearings 21' engaging in the indentations or recesses 22 of the attaching lug 19.

It will now be noted-that the front portion of the pullattaching lug 19 is cut away from the metal of the top wing for the greater part of its length by slitting the wing material as indicated at 23. Since the wing material between the ends of the slit 23 and the rear end of the slider is relatively thin, the top wing can be readily flexed into engagement with the fastener elements whichare thus seof cam projections or lugs 24 on the under side of the pull adjacent the pivot bearings 21. When it, is desired to lock the slider stationary, the pull member is moved to the forward end of its travel relative to the slilder he rounded cam projections 24' will bear against the wing 13 and press it downwardly, thus (ill clamping the fastener elements 10 and 11 and locking the sliderefi'ectively by friction. It will be apparent that during the locking or clamping action the slider will be subjected to a spreading strain, but the lug 19 joined by the reinforce 17, neck 16, and reinforce 18 to the lower'wing, provides a very strong connection for resisting the clamping stresses. '-If the parts are made accurately, there-will never need to be any undue straln placed upon the reinforcin neck in order to provide sufiicient friction tween the slider wings and fastener elements to prevent movement of the slider under all ordinary circumstances of use. -When the-fasteneris being closed'under strain, the tendency of the-wings to spread apart is efiectively resisted since the lug 19 is rigidly joined to the lower wing and the-upper wing is prevented from upward movement by engagement withthe pull member.

As a result'of my invention, it will be observed that -all of the advantages of a lock jections-24 on the pull member.

While Ifhave in this application specifically described one embodiment which my invention may assume in practice, it will be understood that this embodiment is merely for the purposes of illustration and description and that various other forms may be devised within the scope of my invention as defined in the appended claims. a

What I-claim as my invention is:

1. In a slide fastener, cooperating fastener elements for separably connecting adjacent edges of" an article to be fastened, a slider movable along said elements for engaging and releasing the same, said slider comprising overlying spaced wings, an integral neck connection for said wings, a lug integrally joined to said connection and extending adjacent the top wing, a portion of said top wing being movable relative to said 11m, and a cam member attached to said lug adapted in one position to clamp the wings of the slider upon said fastener elements.

2. In a slide fastener, cooperating fastener elements for separably connectin adjacent edges of an article to be fastene a slider movable along said elements for engaging and releasin the elements, said slider comprising overliying top and bottom wings, an integral rein orclng connection of deformed wing materialbetween said wings, an integral projection joined to said reinforcing connection and extending over said top wing,

a portion of said top-wing bein cut away from said lug so as to be mova le relative thereto, and a slider actuating member attached' to said lug having a cam projection adapted in one posit-ion of the pull member to depress said movable portion of the top wing into locking engagement with said fastener elements.

' 3. In a slidefastener, cooperating fastener elements for separably connecting adjacent edges of an article to be fastened, a slider movable along said elements for engaging and releasing the same, said slider comprising spaced top and bottom wings, a neck directly connecting said wings, integral longitudinal reinforces extending from said neck, said neck and reinforces being shaped to maintain the wings in spaced relation independentl of any other wing-holding means, a lug joined to one of said reinforces and extending over the top wing, a portion of said top wing bein flexible relative to said neck and lug, an a slider pull member mounted on said lug and havin a cam pro- 5 jectionfor engaging said flexible wing por- 'tion to force the same into lockingengagement with thelfastener elements.

4. slider for slide fasteners comprising overlymg wings having means for guiding l mter ocking members, integral connecting nd reinforcing means bent between said wings, an attaching lug rigidly joined to. said wing connecting means and extending over one, of said wings, the free end of such 5 wing being cut away from the lug and flexible relative thereto, and a cam member attached to said lug for depressing the flexible end of such wing to lock the slider.

5. A slider for slide fasteners comprising i 2 overlying wings having means for guiding interlocking members, saidslider having means joining said wings and a rigid extension integral with said joining means adjacent one wing, a part at least of said last mentioned wing being flexible relative to said rigid extension to act as a slider lock, a pull member pivoted to said rigid extension and having a cam adapted to act on said flexible portion to lock the slider.

# 6. A slider for slide fasteners comprising overlying wings having means for guiding interlocking members a connection between said wings, one of sai wings being slitted to provide a relatively flexib e ortion, and a cam member attached to the slider for flexing movable along saide'lements for engaging said ortion to lock the slider.

7 a slide fastener, cooperating fastener elements for separably connecting adjacent edges of an article to be fastened, a slider and releasing the same, said slider comprising'overlying spaced wings a rigid neck connection for said wings,- a ug in a1 with a and extending longitudinally from said neck.

connection, a portion of the to wing being l 7 attached to said neck and t movable relative to said hag, an a cam member attached to said lug a apted in one position to clamp the slider upon ,said fastener elements. v 8. A slider for slide fasteners comprising a pair of spaced-aptrt substantially arallel wings, a rigid use for joiningsai J at one-end, one of said wings ing rigi e other of -sai' wings having at least portion flexibly 'at-' tached to said neck, said neck having alongitudinal extension constituting fa ull at.-' taching lug, a pull member conne to said lug, and a cam on said pull member engageable with said flexible wing portion to preset the same toward said rigidly connected wing for locking the slider. In testimony whereof I aflix my signature.

' ERNESTM. WHITNE 

